This just hit me via Debian's 'apt-get update': I'm using jitsi's package repository which is hosted via HTTPS and seems to rely on the expired root-CA. Certificate checks started failing for everybody a few hours ago [1].

That's quite bad, as I tried to do a clean re-install of jitsi-meet, and now I have no installation at all any more.

[1] https://github.com/jitsi/jitsi-meet/issues/6918